linux-kernel - Re: [PATCH V22 00/22] Add support UHS-II for GL9755 and GL9767

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Message-ID: <CAPDyKFqrSS=AhcQxVET9V_SN008Cu=n5PuBF70_yBt2CDjMK-w@mail.gmail.com>
Date: Fri, 4 Oct 2024 13:54:42 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Victor Shih <victorshihgli@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>, linux-mmc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, benchuanggli@...il.com, 
	Lucas.Lai@...esyslogic.com.tw, HL.Liu@...esyslogic.com.tw, 
	Greg.tu@...esyslogic.com.tw, dlunev@...omium.org, 
	Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V22 00/22] Add support UHS-II for GL9755 and GL9767

On Mon, 30 Sept 2024 at 12:47, Victor Shih <victorshihgli@...il.com> wrote:
>
> Hi, Ulf
>
> Sorry for bothering you.
> In this series of patches I have reached the final comments of the sdhci parts.
> Please help review this series of patches.
> I hope to get your feedback to confirm whether there are any needs to
> be modified.
> If you already have a closer look at a paragraph in the series, could
> you let me know your opinions first.
> I look forward to your reply.

Hi Victor,

Just wanted to let you know that I have re-started the review. I am
looking at patch7 right now. Hopefully I should be able to complete
the review later today or on Monday.

Kind regards
Uffe


>
> Thanks, Victor Shih
>
> On Wed, Sep 18, 2024 at 12:47 PM Adrian Hunter <adrian.hunter@...el.com> wrote:
> >
> > On 13/09/24 13:28, Victor Shih wrote:
> > > From: Victor Shih <victor.shih@...esyslogic.com.tw>
> > >
> > > Summary
> > > =======
> > > These patches[1] support UHS-II and fix GL9755 and GL9767
> > > UHS-II compatibility.
> > >
> > > About UHS-II, roughly deal with the following three parts:
> > > 1) A UHS-II detection and initialization:
> > > - Host setup to support UHS-II (Section 3.13.1 Host Controller Setup
> > >   Sequence[2]).
> > > - Detect a UHS-II I/F (Section 3.13.2 Card Interface Detection Sequence
> > >   [2]).
> > > - In step(9) of Section 3.13.2 in [2], UHS-II initialization is include
> > >   Section 3.13.3 UHS-II Card Initialization and Section 3.13.4 UHS-II
> > >   Setting Register Setup Sequence.
> > >
> > > 2) Send Legacy SD command through SD-TRAN
> > > - Encapsulated SD packets are defined in SD-TRAN in order to ensure Legacy
> > >   SD compatibility and preserve Legacy SD infrastructures (Section 7.1.1
> > >   Packet Types and Format Overview[3]).
> > > - Host issue a UHS-II CCMD packet or a UHS-II DCMD (Section 3.13.5 UHS-II
> > >   CCMD Packet issuing and Section 3.13.6 UHS-II DCMD Packet issuing[2]).
> > >
> > > 3) UHS-II Interrupt
> > > - Except for UHS-II error interrupts, most interrupts share the original
> > >   interrupt registers.
> > >
> > > Patch structure
> > > ===============
> > > patch#1-#7:  for core
> > > patch#8-#20: for sdhci
> > > patch#21:    for GL9755
> > > patch#22:    for GL9767
> > >
> > > Tests
> > > =====
> > > Ran 'dd' command to evaluate the performance 3 times:
> > > (SanDisk UHS-II card on GL9755 controller)
> > >                              Read    Write
> > > UHS-II disabled (UHS-I): 85.5MB/s 56.3MB/s
> > > UHS-II enabled         :  182MB/s 75.5MB/s
> > >                              Read    Write
> > > UHS-II disabled (UHS-I): 86.7MB/s 52.1MB/s
> > > UHS-II enabled         :  179MB/s 77.6MB/s
> > >                              Read    Write
> > > UHS-II disabled (UHS-I): 85.8MB/s 49.1MB/s
> > > UHS-II enabled         :  181MB/s 89.8MB/s
> > > (SanDisk UHS-II card on GL9767 controller)
> > >                              Read    Write
> > > UHS-II disabled (UHS-I): 81.9MB/s 49.0MB/s
> > > UHS-II enabled         :  186MB/s 87.9MB/s
> > >                              Read    Write
> > > UHS-II disabled (UHS-I): 80.8MB/s 53.5MB/s
> > > UHS-II enabled         :  192MB/s 87.3MB/s
> > >                              Read    Write
> > > UHS-II disabled (UHS-I): 81.0MB/s 53.9MB/s
> > > UHS-II enabled         :  199MB/s 73.6MB/s
> > >
> > > Test command
> > > =====
> > > Read: dd if=/dev/mmcxxx of=/dev/null bs=4096k count=2000 iflag=direct
> > > Write:dd if=/dev/zero of=/dev/mmcxxx bs=4096k count=2000 oflag=direct
> > >
> > > Changes in v22 (September. 13, 2024)
> > > * Rebase on latest mmc/next.
> > > * Adjust patch order to avoid defined but nt used warnings:
> > >   v21 patch#18 to v22 patch#14.
> > >   v21 patch#14 to v22 patch#15.
> > >   v21 patch#15 to v22 patch#16.
> > >   v21 patch#16 to v22 patch#18.
> > > * Patch#14: Remove unnecessary code to avoid defined but not used warnings.
> > > * Patch#15: Add necessary code to avoid defined but not used warnings.
> > > * Patch#16: Remove unnecessary code to avoid defined but not used warnings.
> > >             Modify commit message.
> > > * Patch#17: Remove unnecessary code to avoid defined but not used warnings.
> > > * Patch#18: Add necessary code to avoid defined but not used warnings.
> >
> > For SDHCI:
> >
> > Acked-by: Adrian Hunter <adrian.hunter@...el.com>
> >
> >